US1982566A

US1982566A - Two-feed dbcxlab knitting machine

Info

Publication number: US1982566A
Authority: US
Publication date: 1934-11-27
Anticipated expiration: 1951-11-27

Description

vISYShees--Sh'eet l Y `A. cs.4 BELFORD Two-FEED yGIRCULAR-'KN-I'I'TINGl MACHINE I Filed ,July 1 1, 1935 Now-27,1934.

- INVEN'ro ALEXANDER G. ,BELFORD .HM/ff vBY HIS ATTORNEYS Nov, 27, 1934. A. G. BELFORD TWC-FEED CIRCULAR KNITTING MACHINE Filed July l1, 1933 3 Sheets-Shat 2 N\m\ IIIIIII lli lllll l.

IlllllwlllllrlIlWlT IIIIIIII Illl) mvEN'ron 4vALEXANDER G, BELFORD BY HIS ATTORNEYSv Nov. 27, `1934. A. G. BELFoRD TWO-FEED CIRCULARV KNITTING MACHINE Filed July 11, 1953 s sheets-,sheet 3 INvr-:Nron ALEXANDER G. BELFORD BY HIS ATTORNEYS Patented Nev. 21, 1934 PATENT AOFFICE Two-mn cnwULAn xm'rmo MACHINE alexander c. nuora, Laconia, N. n., signor v Scott Williams, Incorporated, New York, N. Y., a corporation of Massachusetts Application 11, 1933, Serial No. 679,946

norms.

This invention relates to circular knitting machines arranged for rib and plain knitting and having Jack selecting means to provide for knitting dierent patterns and it is an object of this invention to provide an improved machine of the type described which shall operate as a twofeed machine in plain knitting and in which jack selections made before the feeding of the auxiliary yarn in a course are maintained until after the needles take the main yarn or yarns in that course. y

In the drawings- Figs. 1, 2 and 3 are developments of the cylinder cams with needles, their operating jacks and the paths of the needles indicated thereon; Fig. l showing the operating cam's and the paths of the needles for the knitting of rib work; Fig. 2

' ing the means for4 operating the transfer and auxiliary knitting cams; and

Figs. 6 and 7 are details of the operating mechanism shown in Fig. 5.

In the drawings the cylinder cam arrangement shown is that of a rib knitting machine, being substantially that of the rlb knitting machine 'shown in the patent to Scott, No. 1,641,101, is-

sued August 30th, 1927, but provided with`pattern jacks which may be selected by any suitable means, as'the jack selecting means shown in the patent to Grothey, No. 1,678,385, issued July-24, 1928, or in the application of Albert E. Page, Serial No. 359,962. filed May 2. 1929, and modled to provide for two-feed operation during plain rotary knitting in accordance withthis invention. y ,l

As shown in the drawings there is provided the cam ring 271 having the knitting

cams

357, 360 and 361.

switch cams

415 and 415 which together perform thefunetlons of the cam 415 of the Scott patent, dividing cam 4, transfer-cam andtheothercamsusualinthistypeofma-l -aration of the instep needles from the needles l used in knitting the heel and toe. Cooperating ing the jacks and the needles mounted in the l cylinder grooves with the jacks. The sinker cam cap V300 is provided with the usual

sinker operating cams

305, 307 which operate the sinkers in the region of the main knitting wave formed by the knitting

cams

357, 360 and 361 in the cam ring 271.

Previously, in machines for knitting rib fabric or automatically turned welts, the auxiliary yarn' feed has been placed to the left of the left hand stitch cam 360, as viewed in Fig. 1, but this placement leaves no room for needle selection between the main and auxiliary yarn feeds and renders patterning in the auxiliary yarns diihcult, if not impossible, and where a pattern is formed by means of tuck .stitches taken at the main yarn feed, the pattern is broken on the instep on the rst revolution of round-and-round knitting after coming on the heel. In order to overcome the objections arising from placing the auxiliary or additional yarn feed at the left of the stitch cam 360, the auxiliary'or additional yarn feed is placed at the right of the right hand stitch cam 361 and the transfer cam 25, which raises the inactive cylinder needles to take the loops from the dial needles after rib knitting is finished, is made adjustable as to its position in the cam ring 271 to permit of the insertion of auxiliary cams and' 3l. The

cams

30 and 31 serve to operate the needles whoseV butts they engage ln. a knitting ,fwave, cam 30 raising the needles to clear their latches and take the auxiliary yarn fed by the auxiliary yarn guide F, and cam 31 lowering the needles to cast off the loops previously taken.' Cooperating in the knitting at the auxiliary yarn feed are auxiliary cams in the sinker ring 300 comprising a cam 32 to withdraw the sinkers to allow the yarn to be drawn under their nebs and a cam 33 to reinsert or restore the sinkers to `-theirforward position.

erated toA operative and inoperative positions by a means such as is shown in the application of ThesecamsmaybeOD-.

H. G. Dickens, lSerial No. 644,525, flied November 26th, 1932. l

Cam 25 would, if left in its operative position, prevent the insertion of the

auxiliary knitting cams

30 and 31 at the desired place on the cam ring 271 while cams 30 and 31, if left in their operative position, would prevent properly positioning the transfer cam 25. In order to permit 0I the removal of the transfer cam 25 and the l the block 50 and are threaded into the cam ring 1 insertion of the auxiliary knitting cams and 31, the transfer cam 25 is carried upon a guide block secured to the cam ring 271 by bolts or screws 52 which extend through'slots 53 in -vided with an adjustable stop 58 positioned to engage the bed plate B and limit the movement of the block'50 and cam 25 in one direction while the other portion of the forked end is provided with a pin 59 which engages in a slot 60 in one end of la link 6l. The other'end of link 61 is pivotally` connected to an end of a lever 62 .which Ais pivotally mounted intermediate its ends upon a pin 63 carried by one arm of a lever 64. The lever 64 extends in both directions from its connection with the lever 6 2 and is centrally pivotedat 66 upon a bracket 67 secured to the bed plate B.

A thrust rod 70 operated in the usual manner from the main pattern drum or other suitable operating means, is held in position by a guide plate 72 to place a cam 74 upon the upper end of the thrust rod between the free ends of the

levers

62 and 64 and upon operation of the thrust rod 70 to operate the levers 62 and 64.to shift the'cam 25, which. is connected to lever 62. and to move the

auxiliary knitting cams

30 and 31, which are connected to lever 64. to operative or' inoperative positions. Spring connected to the lever 56 and the link 61 tends to hold the pin 59 at the inner end of the slot 60 in the link 61 while the spring 65' connected to the lever 62 and the bed plate B tends to operate the lever 56 through the link-61 in a clockwise direction tov the positionshown in Fig. 5 and.to.hold lever 62 in engagement with the cam' 74. .While the connections of the

auxiliary knitting cams

30 and 31 to the lever 64 and the means for mounting these cams are not shown it is to be understood4 any suitable connecting means and mounting means may be used, suitable means for this purpose being shown in the patent to Scott. No. 1,317,897, issued Oct. 7, 1917. The connections between the

levers

62 and 64 and between the levers and the cams operated thereby are such that the cam 25 is shifted along the cam ring 271 from its operative position to an inoperative position when the thrust rod is raisedto operate lever 64`to shift cams 30 and 3l to their operative position and the cam 25 is shifted to its operative" position when the thrust rod is lowered and the cams 30 and 3l are returned to their inoperative positions.

In the knitting of a stock, knitting from top to toe, the welt andthe rib top are knit in the usual manner, such as that described in Patent No.V

1,641,101 referred toabove. the auxiliary yarn guide F* and the auxiliary knitting cams 80. 31

being held in an inoperative or inactive position during the knitting of these parts. During the knitting of theA rib top the alternate cylinder needles which cooperate with the dial needles are raised by their pattern jacks, which engage the cam 100, to a position in which their latches are cleared and their butts pass over the dividing 2511) 4 and are guided by the knitting cams 357. 360 and 361 to cause these needles to take the yarn at the main yarn guides Fl'and to cast off the loops of yarn previously taken. 'I'he remaining cylinder needles are not raised by their jacks at this time to clear. their latches and these needles are guided by the dividing cam 4 so as topass below the knitting cam 360 and not take yarn at the main yarn guides. After the rib top has been completed and the transfer of the loops from the dial needles to the previously inactive cylinder needles, accomplished by the transfer cam 25 raising the needles to the transfer level, the push rod 70\ is operated by the racking of the main pattern drum or other suitable operating means, operating the levers 62 and 64to shift the transfer cam 25 along the cam ring 271 from its operative position andto shift the

cams

30 and 31 in' wardly to their loperative positions in which they.l

engage the butts of the needles.' 'I'he auxiliary yarn guide is falso placed in operative position` and '3l to operative' position and the leading stitch cam 361 is withdrawn. Any suitable means for operating the auxiliary yarn guide in conjunction with the auxiliary knitting cams may be used, such a means being shown in theScott Patent No. 1,317,897, previously mentioned: and -the leading stitch cam 361 may be withdrawn by any suitable cam operating means such asis shown in Patent No. 1,725,275, Houseman, August 20th, 1929, for operating a diilerent cam.

With the loops transferred from the dial needles and the auxiliary knitting c ams and yarn guide in operative positions, the needles corresponding to the pattern jacks 736 whose lower portions have been moved inwardly by the pattern Ameans con- 4trolling thejacks are raised by the auxiliary raising cam 30 to a position in which theirlatches are cleared while the remaining needles are raised to the same level by the jacks which were not operated by the selecting means riding over jack cam 100. All the needles are drawn down by the auxiliaryfdraw down cam,3l, the needles taking the auxiliary yarn and casting oil' the old loops. The butts of all the, needles areengged by the cam, face 40 of the cam ring 271.and the needles are raised to the tucking level in which the needle latches are not cleared of the loops of the auxiliary yarn. The jacks whose lower portions were moved lnwardLv do not engage. the cam 101 and the needles corresponding thereto remain at the-tucking level but the jacks whose lower portions were not moved inwardly engage cam 101 and are raised thereby so that the needles corresponding thereto are raised to a higher level than the other needles and their latches are cleared of the loops of the auxiliary yarn. Where it is los desired to form tuck stitches, the yarn at the main yarn guides F1 is fed from the corner of the throat plate so that the main yarn is taken by both the high and low groups of needles. When the needles are drawn down by the left hand stitch cam 860 the loops which were cleared of the latches of the higher group of needles are cast off in the usual way but the loops on the lower group of needles whose latches were not cleared before these needles took the main yarn are not cast oif at this time and tuck stitches are formed on these needles when both loops are later castY off upon the taking of the auxiliary yarn.

,Y Where it is desired -to make iioat stitches 'instead of tuck stitches the operation o'f the needles by the jacks and cams is the same as when tuck yarn is fed from Aa yarn guide at the right side ofthethroatplate,asseeninFig.l,sothatlt is not taken by the needles which are not raised by their jacks and remain at the tucking level but is taken by the needles which are raised by their jacks. -It'will be noted that the needles which do not take the main yarn in forming oat stitches do not cast olf their loops of auxiliary yarn when drawn down by theleft hand stitch ,cam 360 as these needles did not clear their latches when raised by the cam face v40 of the cam ring 271. After being brought down by the stitch cam 360 all the needles are raised to the tuck position byy the cam face 40* of the cam ring 271 at which level they remain until brought down by the leveling cam 8 to pass the usual needle protector. The needles remain at this level until raised w a latch clearing position by the cam after which they are again brought down by the switch cam 415 to a level at which they engage the auxiliary raising cam unless raised by their pattern jacks. While the needles are being operated at thefauxiliary yarn guide to take and knit the auxiliary yarn the

auxiliarycams

32 and 33 in the sinker cam cap operate the slnkers to retract the sinkers and allow the yarn to be drawn under their nebs and then to again advance the sinkers and restore the engagement of the sinkers with the fabric.

In going onto the heel or toe afterV knitting the plain fabric of the leg or instep the high buttV instep needles are raised by the switch cam 415` to the lidling position in which they clear the main knitting cams while the low butt needles on which the heel and toe are knit are not affected by the switch cam 415* and pass by it tobeoperatedintheusualmannerbythemainl butt instep needles are returned into action for the first revolution of round-and-rounrl knitting bytheswitchcamnintimetoberaisedbythe jacks'l36andtheamriliaryraisingcam30. The switch cam 415 in returning the high butt needles into action does not lower them sufficiently to cast ofl' the loops which were below the latches of the needles raised to the idling position during theknittingofthetoeorheelsothatasthese needles are raisedto take the auxiliary yarn for the knitting of the instep the loops which were retained on these needles at the main knitting wave are properly positioned to continue the knitting of the instep without any interruption ofthepatternbeingmade. Itwillbenotedthat inthe knitting of theleg and instep the jack selection for patterning is made before the taking of the auxiliary yarn and. once made, is maintainedforthetakingandknitting ofthemain 'molyms.

I claimzy Llnacircularknittingmachinehavingindependent needles, two needle cams having conicingv operating positions in\combination with means adapted to move one cam circumferentially into and out `of operative position and means adapted to move the othercam radially into andout of operative position. v

2, Inacircularknitting machine having independentneedles,atransfcrcamandanauxiliary knitting camhaving conflicting operating positions, means to shift said transfer cam circumferentially to and from its operative position and means to shift said auxiliary knitting cam radially into and out of operative position.

'3. In a circular knitting machine having independent needles, two needle cams having conicting operating positions, in combination with means to shift said cams into and Vout of their operative positions.

4. In a circular knitting machine having independent needles, a transfer cam and an auxiliary knitting cam having conflicting operating positions and means to replace one of said cams by the other of said cams.

5. In a circular knitting machine having independent needles, a plurality of needle operating cams having conflicting operating positions and means operating said cams on relatively angulilly disposed paths to replace one cam by the o er.

6. In a circular knittingmachine having a plurality of yarn feed positions, cams for forming knitting waves at each yarn feed position, jacks operating selected needles at both yarn feed positions upon jack selections made prior to the first yarn feed position, a cam at on`e yarn feed position having an operative position conicting with the operative position of one of the cams forming the knitting wave at that yarn feed position and means to replace one of. said cams by the other.

7. In a circular knitting machine having main and auxiliary yarn feed positions, cams for forming knitting waves at each yarn feed position, jacks operating selected needles at both yarn feed positions upon jack selections made prior to the auxiliary yarn feed position, a camhaving an operative position conflicting with the operative position of one of the cams forming the knitting wave at the auxiliary yarn feed positionl and means to replace one of said conflicting cams by the other.

8. In a two-feed circular knitting machine two needle cams having conflicting operating positions at the leading yarn feed, means to shift saidA needle cams into and out of their operative positions, a third needle cam cooperating with one of said two needle cams to operate .the needles in a knitting wave at the leading yarn feed and jacks for causing needle selections at each of said yarn feeds by jack selections made prior to said leading yarn feed.

9. In a circular knitting machine arranged for l'lb and plain knitting and having separated yarn feeds, cams forming knitting waves at each yarn feed, jack operating cams and jacks operated by said cams, one of said cams shifting jacks to effect needle operation at the leading yarn feed during rib knitting and said cams shifting jacks to effect needle operation at both yarn feeds during plain knitting upon jack selections made prior to said leading yarn feed at which all needles draw new loops and cast off their old loops, the jack selection being ineffective to cause selective knitting at said leading yarn feed and effective at a subsequent yarn feed.

10. In a circular knitting machine arranged for rib and plain knitting and having main and auxiliary yarn feeds, cams forming knitting waves at each yarn feed, jack operating cams and jacks operated by said cams, one of said cams shifting jacks to eifect needle operation at the auxiliary yarn feed during rib knitting and said cams shifting jacks to effect needle operation at both yarn all needles draw new loops and cast olif their old loops, the jack selection being ineilective to cause selective knitting at said auxiliary yarn feed and eflectve subsequently at said main yarn feed.

11.l In a circular knitting machine arranged for rib and plain knitting and having a plurality of yarn feeds, cams forming knitting waves at each yarn feed, jacks for operating said needles, and

cams for operating said jacks, one of said cams operating jacks to eiect needle operation at the leading yarn feed'during rib knitting and said cams operating jacks to eiect needle operation at both yarn feeds during plain knitting upon jack selections madeprior to the leading yarn feed, the jack selection being ineffective to cause selective knitting at the firstr yarn feed.

DISCLAIMER u l 1,982,5 66.'Alezander C1. Belford, Laconia,

MACHINE.

Patent dated November 27, 1934.

N. H. Two-FEED CIRCULAR KNrr'rrNa i Disclaimer filed May 29,

v 1935, by the assignee, Scott de. Williams, Incorporated.

Hereby enters this disclaimer to that which is in the follo Words, to Wit:

3. In a circulvfliiam 'tt'ing machine having independent needles, two needle vpart-of lthe claimin said specification cams having conilcting operating posi-tions, in combination with means to shift said cams into and 'out of their operative posi-tions,

"5. In a circular knitting machine having independent needles, a plurality of needle operating cams having conflicting operating positions and means operating said camsfon' relatively angularly disposed paths to replace one cam by the other.

Gazette June,18,.1935.]

all needles draw new loops and cast olif their old loops, the jack selection being ineilective to cause selective knitting at said auxiliary yarn feed and eflectve subsequently at said main yarn feed.

DISCLAIMER u l 1,982,5 66.'Alezander C1. Belford, Laconia,

MACHINE.

Patent dated November 27, 1934.

N. H. Two-FEED CIRCULAR KNrr'rrNa i Disclaimer filed May 29,

v 1935, by the assignee, Scott de. Williams, Incorporated.

Hereby enters this disclaimer to that which is in the follo Words, to Wit:

Gazette June,18,.1935.]